Final answer:
c) Incident command post. The ISO should be processed through the incident command post when assigned to high-risk areas.
Step-by-step explanation:
The correct answer is c) Incident command post.
When assigned to check out interior immediately dangerous to life and health (IDLH) or high-risk areas, an ISO (incident safety officer) should request a partner from the IC (incident commander) and be processed through the incident command post just like any other crew. The incident command post serves as the central location where the IC and other key personnel coordinate and manage the response to an incident.
This process ensures that the ISO is properly accounted for and follows the established protocols and procedures for entering and operating in high-risk areas.